This is a National Trial Print of a unit on plants produced as a part of the Australian Science Education Project. The unit consists of an information booklet for students, a booklet for recording student data, and a teacher's guide. The material, designed for use with students in the upper elementary grades, takes from 15 to 20 forty-minute periods to complete. The content and activities permit the investigation of the diversity of plant types and how the variety of plants changes from one locality to the other. In the core of the unit, students are encoraged to grow their own plants at school and study different groups of plants. All investigations require only simple equipment that can be used in the ordinary classroom although space for growing plants and a source of water are essential. Much of the unit could be done outdoors. (PEB)